Metal-polish



same sense that dry sand is clean.

HENRY TBUBERG, OF

PATENT OFFICE.

ASTORIA, NEW YORK.

METAL-POLISH.

No Drawing. Application filed May 26,

To all whom it may concern:

Be it known that I, HENRY TRUBERG, a citizen of the United States of America, residin at Astoria, in the county of Queens and S tate of New York, have invented certain new and useful Improvements in Metal- Polish, of which the following is a specification.

My invention relates to improvements in compositions of matter particularly adapted for polishing metals or similar surfaces.

It has for its object the provision of a polish which is free from deleterious and dangerous ingredients often used, which is of a very fine grain, and which utilizes material now commercially treated as waste.

I have discovered a material, heretofore considered purely as a Waste product, as the basic element of my improved polish. This material is one of the products of combustion resulting from burning anthracite coal, particularly in large steam boiler installations. It is found as a deposit between the fire andthe top of the smoke stack. This deposit is in the form of an extremely fine hard carbon powder which is clean in Itfie e characteristic which makes it useful for my purpose is its unique and finely divided state of hard crystalline structure. For example, it will pass through a screen of 140 mesh. In the polish this material acts as a most efficient abrasive element because While it is abrasive and hard enough to work mechanically on metals, it is, nevertheless, so extremely fine that a slight rubbing action gives an improved polish.

The tubes and tube sheets of fire tube boilers and the area adjacent and outside the tubes of water-tube boilers of large steam installation present depositing areas for the material I desire to use. When anthracite coal is burned, these areas, as well as others between the fire and the smoke stack outlet, need to be frequently cleared of the deposit, and it is this material. heretofore considered purely as a Waste product that I have found so superior as the basic element of a polish.

To make up my polish, the material found Specification of Letters Patent.

Patented Feb. 1, 1921. 1919'. Serial No. 299,900.

as described may be mixed with a carrying liquid, such as water, and used as a polish in this form. It is desirable, however, to add to this emulsion a drying material, such as whiting, which will prevent the material caking on the metal surface and will aid in the rubbing off of the polish after it has dried on the metal. The whiting is added to the polish to give body to the mixture whereby there will be a more rapid and uniform drying of the same when it is applied to a metal surface so that the polish as deposited upon the metal will be in the form of dust rather than cakes of dried material and thus scratching of the metal is prevented and a uniform polish applied. As the function of the whiting is to give body to the polish and that of the water is to give sufficient fluidity to enable it to be readily used, the proportion of these elements may be varied within wide limits without affecting the action of the polish.

I prefer, however, to use substantially the following proportion of ingredients- Finely divided carbon materialone part. Whiting one part. Water four parts.

In mixing the ingredients, the Water is preferably heated substantially to the boiling point.

A polish made according to the invention disclosed above may be left to dry on the metal surface with no deleterious effect, such as is the case with polishes containing acids, alkalis, or other chemically active substances.

I claim-- 1. A metal polish comprising finely divided deposit material formed as a combustion product of anthracite coal, and a liquid carrier therefor.

2. A metal polish comprising a base of finely divided deposit material formed as a combustion product of anthracite coal, a drying agent, and a liquid carrier for said base and drying agent.

HENRY TRUBERG.

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